Background on the exhibition is here. A few other recent posts on the lost Temple menorah are here, here, and here. Follow the links in those posts for much more on the Temple menorah and on ancient menorahs in general.

UPDATE: Incorrect link now fixed!

Just to be clear, my comments above were directed at the claim that the Vatican knows something it isn't telling about the fate of the golden menorah looted by the Romans from the Jerusalem Temple. There is no reason to think the Vatican has the menorah or any special information about it. Follow the background links above for details.

The exhibition sounds very informative about the history of the menorah in general.